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package org.odftoolkit.odfdom.type;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.SchemaDVFactory;
import org.apache.xerces.impl.dv.ValidatedInfo;
import org.apache.xerces.impl.dv.XSSimpleType;
import org.apache.xerces.impl.validation.ValidationState;

/** This class validates string to be valid W3C schema data types.
In general it takes advantage of already existing underlying parser functionality and encapsulates it */
class W3CSchemaType {
	// validate the content by the dataType which is defined in XML schema

	static boolean isValid(String dataType, String content) {
		boolean isValid = false;
		try {
			// SchemaDVFactory / Enumeration Dataype
			XSSimpleType simpleType = SchemaDVFactory.getInstance().getBuiltInType(dataType);
			if (simpleType != null) {
				simpleType.validate(content, new ValidationState(), new ValidatedInfo());
				isValid = true; //Xerces docu is a little weak, we assume it works this way
			} else {
				throw new IllegalArgumentException("Datatype " + dataType + " does not exist!");
			}
		} catch (InvalidDatatypeValueException e) {
			isValid = false;
			Logger.getLogger(W3CSchemaType.class.getName()).log(Level.FINE, content + "is not of datatype " + dataType + "!", e);
		}
		return isValid;
	}

	private W3CSchemaType() {
	}
}
